Treadle mechanism.



T. A. 'PANYARD.

TREADLE MECHANlSM- APPLICATION FIEEDV 29. 914.

PdtentedMar. 2 1918.

THOMAS A. PANYARD, OF MILWAUKEE, WISCONSIN, AS-SIG-NOR 'IO LUTHER GRINDER MANUFACTURING COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

'rnnAnLn MECHANISM.

Specification of Letters Patent.

Patented Mar. 26, 1918.

Application filed May 29, 1914. Serial No. 841,711.

and similar tools which are driven by foot power.

The object of my invention is to provide an improved form of treadle mechanism for foot power grinders and other machinery of that class in which clamps are employed to detachably connect the grinder or other machine to a supporting table or bench.

More specifically stated, my object is to provide means for separately clampinga treadle driving mechanism to the same bench or table upon which the driven machine is clamped, together with means for adjustably connecting the treadle with a crank or other means for operating the driven machine.

In the drawings- Figure 1 illustrates my invention in elevation and in position of use, in connection with an ordinary grinding machine, the grinding machine and treadle mechanism being detachably supported from a work table to which they are clamped.

Fig. 2 is a fragmentary view, showing a portion of the treadle bar and the means for adjustably securing the connecting rod thereto, the connecting rod being shown in cross section, and a portion of the bearings.

. clamping set screw E. A treadle bar F is provided with a pivot bearing sleeve f at one end and a treadle plate 7 at the other end. A pivot pin 0 extends through the sleeve 7 and connects the treadle bar F with the supporting bar or hanger A.

A coiled spring G connects the intermediate portions of the hanger bar A and treadle bar F. The treadle bar F is provided with a stud at g, to which the lower end of the spring G is attached, and the hanger bar A is provided with a flange a, having a series of holes g therein, in any one of which the spring G. may be detachably engaged by merely hooking the extremity thereof into any one of the holes 9. The spring is adapted to hold the treadle bar in a raised position as shown in the drawing, and when said bar is depressed by pressureof the foot upon the treadle plate 7, the spring will be distended, and by its subsequent reaction when the pressure is relieved, the treadle bar will be lifted with a driving pressure.

The driving shaft H of the driven machine, ie. the grinding machine, is provided with a crank arm I, anda connecting rod J is provided with a hook j at its upper end which is loosely hooked over the crank pin 11 and held in place by a nut j on said crank pin. At its lower end the connecting rod J passes loosely through a hole in a pivot pin K journaled in the treadle bar F and in a bracket L formed integrally with the bar F and offset therefrom. A set screw 70 is threaded into the pivot pin K axially and is adapted to bear upon the connecting rod J to clamp it to the pivot pin K in any desired position of adjustment. The pin K oscillates in its bearings and thus permits the connecting rod to swing. from side to side in correspondence with the motion of the crank.

It will be apparent from the foregoing description that my improved treadle mechanism is adapted to be separately shipped and attached to any work table or bench upon which a grinding machine or other crank operated mechanism is mounted, whereby such machine may be operated by foot power. The down stroke of the treadle will of course pull downwardly upon the crank, and upon the up stroke, the connecting rod will push upon the crank owing to the reaction of the spring Gr.

It is to be noted that the clamping member holds supporting bar A in a position such that the bottom of said bar is farther the pull resulting from use of the mechanism to come at a point substantially straight below the clamp. Without this feature, it would be diiiicult to construct a clamp which would not injure the supporting surface. There would be a considerable mo ment tending to turn bar A about the clamp as a pivot. \Vith bar A in the inclined position shown, however, there is practically no rotative tendency.

I claim 1. A treadle mechanism including-a treadle supporting hanger bar provided with a clamp at its upper end adapted to detachably engage a table top.

2. A treadle mechanism, comprising the combination of a treadle supporting hanger bar provided with a clamp at its upper end adapted to detachably engage a table top, a treadlepivotally connected with the lower end of said treadle bar, and a connecting rod adjustably connected with the treadle bar and adapted to be detachably connected with the crank of a driven machine.

3. A treadle mechanism, comprising the combination of a treadle supporting hanger bar provided with a clamp at its upper end adapted to be detachably connected with a tabletop, a treadle bar pivotally connected with the lower end otsaid hanger bar, and aconnecting rod adjustably connected with the treadle bar and adapted to be detachably connected with the crank of a driven machine,together with a spring connecting the intermediate portions of the hanger bar and treadle bar, whereby the treadlemechanism is self contained and wholly supported from said clamp.

4. A treadle mechanism, comprising the combination of a treadle supporting hanger bar provided with a clamp at its upper end, .a treadle pivotally connected with the lower end of said treadle bar, and a connecting rod adjustably connected with the treadle bar and adapted to be detachably connected with the crank of a driven naaclnne, together with a spring connecting the intermediate portions of the hanger. bar and treadle bar, said hanger bar being provided with a flange having a series of apertures in which said spring may be detachably connected.

5. A'detachable treadle mechanism comprising the combination of a supporting bar, manually operated clampin-gmeans at the upper end thereoifla treadle pivotally secured to the lower end thereof, an adjustable pitman pivoted to the treadle, a spring connecting the intermediate portions of said treadle and said supporting bar, and insane for operativelyfastening said pitman to the crank of a driven machine whereby said treadle mechanism may be substituted for the ordinary handle for operating said driven machine.

6. A detachable treadle mechanism comprising the combination ofa pitnian operatively connected to a driven machine, a treadle bar pivoted to thepitman, a sup portingbar pivotally carryingone end of the treadle, and a set of manually operated clamping members at theupper end of the supporting'bar adapted to engage a table top adjacent to said driven machine, the clamping faces of the clamping members being disposed oblique to the supporting bar, whereby said supporting bar is inclined upon attachment of said clamping members to a horizontal support, whereby the load is applied substantially in a verticalline passing downwardly through. said clamping members. l

In testimony whereof I aflix my signature in the presence of two Witnesses.

THOMAS A. PANYARD.

WVitnesses V LEvnnn'rT C. WHEELER, IRMA D. BREMER.

copies l t may be obtained for five cents each, by addressing the"0ommissionerof Patents,

Washington, D. 0. v 

